RE: Sunday evenings hunt- BH didn't open
Unless I am not seeing something correctly, it is physically impossible for the blades not to have opened if the o-ring is pushed back to where it is. If it starts in front of those “wings”, it can’t get past them without pushing them out of the way (in turn opening the blades). I believe the blades appear closed, because when the arrow passed thru, the fletching stuck (last thing out of the animal) and the blades swung forward (closing) and that is how you found the arrow.